Rps Unable To Join Spt In Pim-Sm; Rpt Establishment Failure Or Source Registration Failure In Pim-Sm - HP A6600 Configuration Manual

Solution
Check the minimum TTL value for multicast forwarding. Use display current-configuration to check
1.
the minimum TTL value for multicast forwarding. Increase the TTL value or remove multicast
minimum-ttl configured on the interface.
Check the multicast forwarding boundary configuration. Use display current-configuration comand
2.
to check the multicast forwarding boundary settings. Use multicast boundary to change the multicast
forwarding boundary settings.
Check the multicast filter configuration. Use display current-configuration to check the multicast filter
3.
configuration. Change the ACL rule defined in the source-policy command so that the source/group
address of the multicast data can pass ACL filtering.

RPs unable to join SPT in PIM-SM

Symptom
An RPT cannot be established correctly, or the RPs cannot join the SPT to the multicast source.
Analysis
As the core of a PIM-SM domain, the RPs serve specific multicast groups. Multiple RPs can coexist in
•
a network. Make sure that the RP information on all routers is exactly the same, and a specific group
is mapped to the same RP. Otherwise, multicast forwarding will fail.
• If the static RP mechanism is used, the same static RP command must be executed on all the routers in
the entire network. Otherwise, multicast forwarding will fail.
Solution
Check that a route is available to the RP. Carry out display ip routing-table to check whether a route
1.
is available on each router to the RP.
Check the dynamic RP information. Use display pim rp-info to check whether the RP information is
2.
consistent on all routers.
Check the configuration of static RPs. Use display pim rp-info to check whether the same static RP
3.
address has been configured on all the routers in the entire network.

RPT establishment failure or source registration failure in PIM-SM

Symptom
C-RPs cannot unicast advertise messages to the BSR. The BSR does not advertise bootstrap messages
containing C-RP information and has no unicast route to any C-RP. An RPT cannot be established correctly,
or the DR cannot perform source register with the RP.
Analysis
The C-RPs periodically send C-RP-Adv messages to the BSR by unicast. If a C-RP has no unicast route
•
to the BSR, the BSR cannot receive C-RP-Adv messages from that C-RP and the bootstrap message of
the BSR will not contain the information of that C-RP.
In addition, if the BSR does not have a unicast router to a C-RP, it will discard the C-RP-Adv
•
messages from that C-RP, and therefore the bootstrap messages of the BSR will not contain the
information of that C-RP.
• The RP is the core of a PIM-SM domain. Make sure that the RP information on all routers is exactly
the same, a specific group G is mapped to the same RP, and unicast routes are available to the RP.
161